:root{
  --bg:#0b1018; --bg2:#0e1622; --card:#121a27; --card2:#16202f;
  --line:rgba(255,255,255,.09); --line2:rgba(255,255,255,.14);
  --tx:#e7ebf2; --tx2:#9fb0c8; --tx3:#6f8099;
  --acc:#4f7cff; --acc2:#f5a623; --good:#34d399; --warn:#fbbf24; --bad:#f87171;
  --r:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:radial-gradient(1200px 600px at 50% -10%,#16243b 0%,var(--bg) 55%) fixed;color:var(--tx);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}

/* header */
.hd{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;
  padding:12px 16px;padding-top:calc(12px + env(safe-area-inset-top));
  background:rgba(11,16,24,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.logo .m{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#1b2436,#0c1220);
  display:grid;place-items:center;border:1px solid var(--line2)}
.logo .m i{width:14px;height:14px;border-radius:4px;background:var(--acc2);box-shadow:-7px 0 0 -1px var(--acc);display:block}
.hd-t{display:flex;flex-direction:column;line-height:1.15}
.hd-t b{font-size:16px;font-weight:800;letter-spacing:.01em}
.hd-t small{font-size:11.5px;color:var(--tx3);font-weight:600;letter-spacing:.02em}
.cat{margin-left:auto;font-size:11px;color:var(--tx3);font-weight:700;background:var(--card);
  border:1px solid var(--line);padding:4px 9px;border-radius:999px;white-space:nowrap}

/* layout */
.wrap{max-width:720px;margin:0 auto;padding:18px 16px 30px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin-bottom:16px;
  box-shadow:0 10px 40px rgba(0,0,0,.32)}
.center{text-align:center}
.hidden{display:none !important}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
  font-size:15px;font-weight:700;border-radius:12px;padding:13px 20px;border:1px solid transparent;
  text-decoration:none;transition:transform .06s ease,filter .15s ease;user-select:none}
.btn:active{transform:translateY(1px)}
.btn.primary{background:linear-gradient(135deg,var(--acc),#3b63e6);color:#fff;box-shadow:0 6px 18px rgba(79,124,255,.32)}
.btn.primary:hover{filter:brightness(1.06)}
.btn.ghost{background:var(--card2);color:var(--tx);border-color:var(--line2)}
.btn.ghost:hover{background:#1b2738}
.btn.wide{width:100%;margin-top:4px}
.btn input{display:none}

/* intake */
.intake{padding:0;overflow:hidden;background:transparent;border:none;box-shadow:none}
.drop{border:1.5px dashed var(--line2);border-radius:var(--r);background:var(--card);
  padding:34px 22px;text-align:center}
.drop.drag{border-color:var(--acc);background:var(--card2)}
.drop-ico{font-size:42px;margin-bottom:6px}
.drop h1{font-size:22px;font-weight:800;margin:6px 0 8px}
.sub{color:var(--tx2);font-size:14px;max-width:42ch;margin:0 auto 18px}
.btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.tip{color:var(--tx3);font-size:12px;margin:16px 0 0}

/* preview */
.preview-img{border-radius:12px;overflow:hidden;background:#0a0f18;margin-bottom:14px;
  max-height:60vh;display:flex;justify-content:center}
.preview-img img{max-height:60vh;object-fit:contain;width:auto}
.preview-act{display:flex;gap:10px}
.preview-act .btn{flex:1}

/* loading */
.spinner{width:42px;height:42px;border-radius:50%;border:3px solid var(--line2);
  border-top-color:var(--acc);animation:spin .8s linear infinite;margin:6px auto 14px}
@keyframes spin{to{transform:rotate(360deg)}}
#loadMsg{font-weight:700;font-size:15px;margin:0 0 16px}
.steps{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.step{font-size:11.5px;font-weight:700;color:var(--tx3);background:var(--card2);
  border:1px solid var(--line);padding:5px 11px;border-radius:999px;transition:.2s}
.step.on{color:#fff;background:linear-gradient(135deg,var(--acc),#3b63e6);border-color:transparent}
.step.done{color:var(--good);border-color:rgba(52,211,153,.4)}

/* error */
.err-ico{font-size:34px;margin-bottom:8px}
#errMsg{color:var(--tx2);font-size:15px;margin:0 0 18px}

/* best match card */
.best{padding:0;overflow:hidden}
.best .conf{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(79,124,255,.10),transparent)}
.conf-badge{font-size:12px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;white-space:nowrap}
.conf-badge.hi{color:#062b1c;background:var(--good)}
.conf-badge.mid{color:#3a2a05;background:var(--warn)}
.conf-badge.lo{color:#3a0d0d;background:var(--bad)}
.conf-meter{flex:1;height:7px;border-radius:999px;background:var(--card2);overflow:hidden}
.conf-meter i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--acc2),var(--good))}
.conf-pct{font-size:13px;font-weight:800;color:var(--tx);min-width:38px;text-align:right}

.compare{display:grid;grid-template-columns:1fr 1fr;gap:0}
.compare figure{margin:0;position:relative;background:#0a0f18;aspect-ratio:1/1;overflow:hidden}
.compare figure img{width:100%;height:100%;object-fit:cover}
.compare figcaption{position:absolute;left:10px;top:10px;font-size:10.5px;font-weight:800;letter-spacing:.06em;
  color:#fff;background:rgba(0,0,0,.6);padding:4px 9px;border-radius:6px}
.compare .arrow{position:absolute;top:50%;left:100%;transform:translate(-50%,-50%);z-index:3;
  width:34px;height:34px;border-radius:50%;background:var(--card);border:1px solid var(--line2);
  display:grid;place-items:center;font-size:15px;color:var(--acc2)}

.best-body{padding:16px 18px 20px}
.verdict{font-size:14.5px;color:var(--tx2);margin:0 0 14px;font-style:italic}
.best-name{font-size:18px;font-weight:800;line-height:1.3;margin:0 0 4px}
.best-brand{font-size:13px;color:var(--tx3);font-weight:700;margin-bottom:14px}
.store-tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.03em;padding:3px 9px;border-radius:6px;
  margin-bottom:10px;text-transform:uppercase}
.store-tag.lowes{color:#fff;background:#004990}
.store-tag.depot{color:#fff;background:#f96302}
.store-tag.other{color:var(--tx);background:var(--card2);border:1px solid var(--line)}

.specs{display:grid;grid-template-columns:auto 1fr;gap:7px 16px;font-size:13.5px;margin:0 0 16px}
.specs dt{color:var(--tx3);font-weight:700}
.specs dd{margin:0;color:var(--tx);font-weight:600}

.price-row{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;margin:0 0 16px;
  padding:12px 14px;background:var(--card2);border-radius:12px;border:1px solid var(--line)}
.price-big{font-size:24px;font-weight:900;color:var(--good)}
.price-unit{font-size:13px;color:var(--tx2);font-weight:600}
.price-each{font-size:13px;color:var(--tx3);margin-left:auto}
.no-price{color:var(--tx3);font-size:13px}

.cta{display:flex;gap:10px}
.cta .btn{flex:1}

.match-reason{font-size:12.5px;color:var(--tx3);margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.match-reason b{color:var(--tx2)}

/* alternates */
.alt-h{font-size:14px;font-weight:800;color:var(--tx2);margin:4px 4px 12px;letter-spacing:.02em}
.alt-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-bottom:18px}
.alt{background:var(--card);border:1px solid var(--line);border-radius:13px;overflow:hidden;
  text-decoration:none;color:inherit;display:flex;flex-direction:column;transition:.15s}
.alt:hover{border-color:var(--line2);transform:translateY(-2px)}
.alt-img{aspect-ratio:1/1;background:#0a0f18;overflow:hidden}
.alt-img img{width:100%;height:100%;object-fit:cover}
.alt-b{padding:10px 11px 12px}
.alt-name{font-size:12.5px;font-weight:700;line-height:1.3;margin:0 0 6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.alt-meta{display:flex;align-items:center;justify-content:space-between;gap:6px}
.alt-price{font-size:13px;font-weight:800;color:var(--good)}
.alt-store{font-size:10px;font-weight:800;color:var(--tx3);text-transform:uppercase}

/* footer */
.ft{max-width:720px;margin:0 auto;padding:6px 18px calc(28px + env(safe-area-inset-bottom));
  text-align:center;color:var(--tx3);font-size:11.5px;line-height:1.6}
.ft-brand{display:block;margin-top:8px;font-weight:900;letter-spacing:.18em;color:var(--tx2);font-size:11px}

@media (max-width:420px){
  .drop h1{font-size:20px}
  .price-each{margin-left:0;width:100%}
}